It was Neville who'd had Sheila admitted in March 1985 because of deterioration of her mental state. At the time she thought Freddie was the Devil,she was restless and laughed inappropriately.
This is from Dr Ferguson's statement. He also knew she used cannabis and cocaine,but stated her psychotic attacks weren't drug induced,though would be exacerbated by the illicit drugs.
Even when Sheila was admitted in 1983,after an acute breakdown,her outlook was poor.
Sheila was a difficult patient and failed to take her medication and appointments.